With the continuous innovation of technology, more and more electronic products are well known, and people are more dependent on electronic products. Nowadays, advertising has entered a new era of digital and video. The key to expand the market of enterprises has also locked out the "fifth generation media" outdoor advertising machine.

At ordinary times, you may also encounter the problem of outdoor LCD advertising machine without sound? Then, how do you run when there is no sound in the outdoor LCD advertising machine? The advertising machine manufacturer tells you how to do it!

1. Inspection equipment

Open the rear cover of the LCD advertising machine, and use the multimeter to measure the power amplifier on the drive board, whether it is electrified and normal? If the power amplifier is normal, is it normal to check the connection line of the horn in the next step?

2. Replacement parts

If the LCD advertising machine driver's power amplifier is abnormal, replace the driving board; if the speaker is abnormal, replace the speaker. In addition, if the connecting line of a general LCD advertising machine speaker is not connected firmly, it is the easiest to fall off. If it falls off, then soldered it with a soldering iron. If the loudspeaker is loud, it will damage the advertising machine drive plate and replace the driving board immediately.

The above is the advertising machine manufacturers to bring everyone when the liquid crystal advertising machine does not sound how to do the solution, I believe everyone knows it, when it comes to this situation, it will not be busy!